78253/55C

Overview

The Murata Power Solutions 78253/55C is a through-hole power transformer designed for the MAX253 controller. It features a single primary and single secondary winding with a 3.3V primary to 5V secondary voltage rating. The unit delivers a 500mW power rating and supports up to 200mA secondary current. Constructed with toroidal windings, it provides 4kVDC isolation. The component measures 15mm in length, 15mm in width, and 12mm in height, operating within a temperature range of 0°C to +70°C.

Feature Summary

• Toroidal construction optimized for J-STD-020D reflow soldering processes
• High-voltage isolation capability rated at 4kVDC between windings
• Engineered specifically for compatibility with MAX253 switching controllers

Applications

• Power supply designs utilizing MAX253 controllers
• Board-mounted isolated DC-DC conversion circuits
• Systems requiring 3.3V input to 5V output isolation

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and electrical characteristics. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the component meets the thermal requirements of the target application environment before integration.

Selection Notes

Select this model when using MAX253 controllers requiring 3.3V primary and 5V secondary outputs. Verify that the through-hole package dimensions fit the PCB layout. Check if the 500mW power rating satisfies the load requirements compared to surface-mount alternatives like the 78253/55MC.

Part Context

This component belongs to the 78253 series of dedicated transformers manufactured by Murata Power Solutions. The series includes various variants such as the 78253/55JC-R and 78253/55MC, differing primarily in mounting style and specific winding configurations. These parts are standard components for isolated power stages in compact electronic devices.

Replacement Considerations

Official suggested alternates include the 78253/55JC. Verify pinout compatibility and electrical parameters before substitution.